Chittering Rats

Tempo with a tax attached, and the tax only lands when the opponent has gas to lose. The 2/2 body is incidental: a fragile blocker for a mana value that asks for two black sources by turn three. The work is in the trigger, which takes whatever the opponent is sitting on and sets their next draw back by one. They keep the card, but they redraw it instead of seeing something new, so the punishment is a stolen draw step rather than a destroyed resource. This is the discard family's gentler relative: where Mind Rot strips cards to the graveyard, this only delays one, and the opponent chooses which one goes back, so they bury their least useful card and the effect never doubles as the hand-shaping tool that Thoughtseize is. The corollary, and the thing that defines how it gets played, is that it whiffs entirely against an empty hand: no card in hand, nothing to put on top, and the rat is just a 2/2. That single failure case inverts the usual disruption logic. Most hand attack wants the opponent flooded with options; this wants them down to one or two cards, where forcing a redraw of their last live card costs them a full turn of development. Any blink or recursion that re-triggers the enters ability turns the one-shot into a recurring tax on the top of their library, provided they keep refilling a hand for it to prey on.